Iodine-Xenon Studies of Ordinary Chondrites using RELAX

RELAX (Refrigerator Enhanced Laser Analyser for Xenon Gilmour et al., 1994a) is a resonance ionization, time-of-flight mass spectrometer designed for the analysis of xenon from extraterrestrial samples. It combines a species-selective resonance ionization ion source with a cryogenic sample concentrator and a low-volume time-offlight mass analyser to achieve sensitivites such that a sample of 500 atoms produces in excess of 1 cps. We have previously reported results of iodinexenon analyses chondrules from the Bjurb61e (L6) and Parnallee (LL3) meteorites (Gilmour et al., 1994b). Here we present a preliminary report on the extension of this work to a wider selection of samples.